/*
 * Copyright 2002-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.beans.factory.xml;

import org.springframework.tests.sample.beans.TestBean;

import java.util.Collections;
import java.util.List;

/**
 * Test class for Spring's ability to create objects using static
 * factory methods, rather than constructors.
 *
 * @author Rod Johnson
 * @author Juergen Hoeller
 */
public class FactoryMethods {

    private int num = 0;
    private String name = "default";
    private TestBean tb;
    private String stringValue;

    /**
     * Constructor is private: not for use outside this class,
     * even by IoC container.
     */
    private FactoryMethods(TestBean tb, String name, int num) {
        this.tb = tb;
        this.name = name;
        this.num = num;
    }

    public static FactoryMethods nullInstance() {
        return null;
    }

    public static FactoryMethods defaultInstance() {
        TestBean tb = new TestBean();
        tb.setName("defaultInstance");
        return new FactoryMethods(tb, "default", 0);
    }

    /**
     * Note that overloaded methods are supported.
     */
    public static FactoryMethods newInstance(TestBean tb) {
        return new FactoryMethods(tb, "default", 0);
    }

    protected static FactoryMethods newInstance(TestBean tb, int num, String name) {
        if (name == null) {
            throw new IllegalStateException("Should never be called with null value");
        }
        return new FactoryMethods(tb, name, num);
    }

    static ExtendedFactoryMethods newInstance(TestBean tb, int num, Integer something) {
        if (something != null) {
            throw new IllegalStateException("Should never be called with non-null value");
        }
        return new ExtendedFactoryMethods(tb, null, num);
    }

    @SuppressWarnings("unused")
    private static List listInstance() {
        return Collections.EMPTY_LIST;
    }

    public String getStringValue() {
        return this.stringValue;
    }

    public void setStringValue(String stringValue) {
        this.stringValue = stringValue;
    }

    public TestBean getTestBean() {
        return this.tb;
    }

    protected TestBean protectedGetTestBean() {
        return this.tb;
    }

    @SuppressWarnings("unused")
    private TestBean privateGetTestBean() {
        return this.tb;
    }

    public int getNum() {
        return num;
    }

    public String getName() {
        return name;
    }

    /**
     * Set via Setter Injection once instance is created.
     */
    public void setName(String name) {
        this.name = name;
    }


    public static class ExtendedFactoryMethods extends FactoryMethods {

        ExtendedFactoryMethods(TestBean tb, String name, int num) {
            super(tb, name, num);
        }
    }

}
